Just see if it goes on those things and damages them. I doubt it can do much damage at a time, so you would have plenty of time to notice any nibbling and remove it.
Calcified macros, like the halimeda you have already, are pretty resistant to herbivores in general.
Calcified macros, like the halimeda you have already, are pretty resistant to herbivores in general.

I hope it wasn’t the phytoplankton that killed it?
I don’t have the aiptasia X yet, but I’ll use it right away once it comes.

